Tied Contact (/INTER/TYPE2)
Interface TYPE2, also called tied interface is a nodal constraint to rigidly connect a set of slave nodes to a master surface. The slave nodes forces and moments are transferred to the master nodes, and then slave nodes are positioned kinematically according to the motion of the master nodes.
- Default spotweld formulation
- Optimized spotweld formulation
- Formulation with failure
- Penalty formulation
Default Spotweld Formulation
- Based on element shape functions
- Generate hourglass with under-integrated elements
- Give a connection stiffness function of slave node localization
- Recommended with fully-integrated shells (master)
- Recommended for connecting brick slave nodes to brick master segments (mesh transition without rotational freedom)
Optimized Spotweld Formulation
- Based on element mean rigid motion
- No hourglass problem
- Constant connection stiffness
- Recommended with under-integrated shells (master)
- Recommended for connecting beam, spring, and shell slave nodes to brick master segments
Formulation with Failure
Spotflag=20, 21 and 22
- Rupt= 0 (independent rupture parameters):
- Failure when Max_N_Dist or Max_T_Dist are reached (default)
- Rupt= 1 (coupled rupture parameters):
- Failure when
During the computation, a normal stress, shear stress, normal displacement and tangential displacement are computed and compared to the maximum values defined in the interface. As soon as the maximum criteria have been reached, the normal stress and shear stress will be set to 0.
Penalty Formulation
Spotflag=25
"INCOMPATIBLE KINEMATIC CONDITIONS".